Electric switch.



I-I l C. D. PLATT.

ELECTRIC SWITCH. APPLICATION FILED IuNEza, |917.

Patented Ja11.2 18.

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:l I Q 4 z5 s 2637 1 am, Yara/ice PZ@ Z C. D. PLATT. ELECTRICSWITCH. APPLICATION FILED IuNE 23, 1917.

Patented Jan. 22, 1918.

2 SHEETS*SHEET 2.

5] nvm/Ito@ CLARENCE D. PLATl-, OF BRIDGEPORT, CONNECTICUT.

Ennemis SWITCH.v

Specification of Letters Patent.

intentenv Jan. 22, 191s.

Application ined :une 23, 1917. serial No. 176,575.

To all whom z't may concern:

Be it known that I, CLARENCE D. PLA'i'r, a citizen of theUnited States of America, residing at Bridgeport, Connecticut, have invented a new and useful'Electric Switch, of which the following is a specification.

My invention relates particularly to a construction which is commonly termed an entrance switch.

The main object is to provide a simple compact construction which is capable of carrying 250 volts. I endeavor to make the switch so small and compact that it may be used in the same small sized cabinet or box which is 'commonly used to contain lower voltage switches.

Switches of this character ordinarily have two pivoted switch blades and sockets for cartridge type fuses in line therewith.

By my invention I have produced a switch materially smaller than the standard type of 250 volt switch. I have constructed the parts so that the switch blades are little more than half the length of the standard switch blades, and yet the contacts are safely insulated from each other. I have also provided a finger-guard between the stationary switch contacts. yI have also materially reduced the length of the switch base by placing the outer cartridge fuse sockets nearer together thaii'the others, and extending the terminals laterally therefrom instead of endwise.

Figure 1 is a plan view of a switch embodying the improvements of my invention shown in the closed circuit position but with one of the fuses removed.

Fig. 2 is a side view and longitudinal sec-r tion of thel base on the plane of the line 2-2 of Fig. l,i also showing dotted the switch blades in open circuit position.

Fig. 3 is an end view and transverse section of the base on the plane of the vline 3-3 of Fig. 1.` n

Fig. 4 is an end view and transverse section of the base on the plane of the line 4-4 of Fig. 1. 0

Fig. 5 is a transverse sectional view on the plane of the line 5-5 of Fig. 1, but withY the fusesvoinitted.V

Fig. 6 is a perspective view of the mov,.-

. able switch member.

as porcelain preferably moldedlin one piece.

i which the insulating cross piece 17 is secured by screws or rivets in a suitable manner. Stationary mounted in recesses 20-20 being secured therein by screws 21 which pass upward through the base and screw into plates 22.

The plates 22-22 also serve to hold in place the fuse sockets'23-23. An additional screw 24 may be employed to hold the plate and each fuse socket more securely. The fuse sockets 25-25 are held in -place by screws 2626 which pass through the terminal plates 27-27 and screw into the nuts 28-28. .These fuse sockets 25-25 and terminal plates 27-27 are preferably mounted in recesses 29 which face outwardly at the corners of the base. Binding screws 30-30 are provided at the sides. It will be' noted that the sockets for the fuses such as 31 are arranged on convergingv lines so that the outer ends of the fuses are much closer together than is customary in switches of this character. By having the terminal plates and binding screws at the sides instead of at the ends the base is made materially shorter.

The heavy insulating barrier 32 projects upwardly between the two opposite hinge posts 11-11 and the connected vterminal plates 14-14. A hole 33 extends through the barrier 32 for the passage of a screw for connecting the switch-to a suitable support. A transverse barrier 34 extends between each post 11 and the corresponding switch contact 19. This barrier 34 in conjunction with the barrier 32 forms a corner recess 35 for the post 11. The barrier 36 extends longitudinally between the switch contacts 19-19 and in conjunction with the transverse barrier 34 forms pockets or recesses 37 for the contacts 19-19. This barrier A36 is also preferably grooved as at 38 and forms a finger-guard in conjunction with the arched insulating cross piece 17 so as to readily direct the finger in its engagement with the switch contacts 19-'-19 arey soy , crosspiece and prevent the nger from coming 1n contact with the switch contacts 19-19. The barrier 36 is tapered toward the outer end of the base and is provlded with a hole 39 for the passage of a screw for securing the base to a suitable support. The base is preferably grooved as at 40 and the barrier grooved at ai so as to direct the fingers and facilitate gripping the fuse when it is desired to remove the same.

When the switch is closed, each side'of .the circuitl may be traced as follows: binding screw 15, terminal plate 14, hlnged post 1l, blade 16, contact 19, 'plate 22', socket 23, fuse 31, socket 25, terininal plate 27 and binding screw 30.

The construction is such that when the switch is in the closed circuit position, the height is substantially the same as that of a standard 250 volt switch. The standard type of such switch however is approXia boX.- It is so small in fact, that it may be used in the same size box that would be required for a 110 voltswitch.

I claim:

1. A switch comprising an insulating base having integral upstanding longitudinal and transverse barriers on the face thereof, hinge posts on one end of the baseat opposite sides of the longitudinal barrier, contacts on opposite sides of the longitudinal barrier and on the side of the transverse barrier opposite to the hinge posts, arched switch blades hinged to said posts, separated by tlzclongitudinal barrier and arching over the transverse barrier and an insulating cross piece connecting said blades.

2. In a switch, an insulating base having longitudinal and transverse barriers, hinge posts at one end of the base `on opposite sides of said longitudinal barrier. contacts secured to the base at the opposite side of the transverse barrier and spaced apartby the longitudinal barrier, arched switch bladeshinged to said posts and adapted to engage said contacts, an insulating cross piece connecting said blades and extending across the longitudinal barrier, a part of said longitudinal barrier serving as a finger guard acting in conjunction with the insulating cross piece.

3. In a switch, an insulating base having integral upstanding longitudinal. and transverse barriers on the face thereof, hinge posts secured near one end of the base on opposite sides of the longitudinal barrier and at one side of the transverse barrier, arched switch blades hinged-to said posts, contacts secured to said base on opposite sides of the longitudinal barrier and on the side of the transverse barrier opposite to said hinge posts, an 'insulating cross piece connecting said blades for operating the same, said longitudinal barrier having holes for the passage of screws for securing said switch to a support, one of said holes being at one end of said barrier between said posts and the other hole extending through said longitudinal barrier adjacent said contacts.

4. In an electric switch, an insulating base having longitudinal and transverse barriers, hinge posts secured to said base at opposite sides of the longitudinal barrier at one end of the base, stationary contacts secured to the base on opposite sides of the longitudinal barrier, and spaced apart from the hinge post by the transverse barrier, arched hinged blades connected to said posts, fuse sockets connected to said contacts respectively, fuse sockets secured to the base at opposite sides of the longitudinal barrier and spaced apart from the first mentioned fuse sockets but nearer to each other than said first mentioned fuse sockets, and circuit terminals extending laterally from said last mentioned fuse sockets.

5. In an electric switch, an insulating base, hinge posts and stationary contacts secured thereto, insulating barriers integral with the base and upstanding from the face thereof so as to space each post and contact from each of the other posts and contacts, arched switch blades hinged to said posts, separated by one of the barriers and arching over. another of the barriers, and an operating member connecting the movable ends of said arched blades.

6. In an electric switch, an insulating base, hinge posts and stationary contacts secured thereto, insulating barriers integral with the base and extending therefrom so as to space each post and contact from each of the other posts and contacts, arched switch blades hinged to said posts, an operating member connecting the movable ends of said arched blades, fuse sockets secured to said base on converging lines,

longitudinal barrier, contacts on the base separated from each other by the longitudion the opposite side of the transverse barrier nal barrier and arched to bridge over the and disposed at opposite sides of the longitransverse barrier to engage the switch con- 10 tudinal barrier whereby all of said current tacts, and a handle for operating said switch carrying parts are isolated from each other blades.

by integral insulating portions ot' theJ base,

switch blades hinged to the hinge posts CLARENCE D. PLATT. 

